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This report was generated at 1910 UTC with the discoveries of outbound objects 2018 BP3 (MPEC) and 2018 BH3 (MPEC, DOU), and departed intruder 2018 BF3 (MPEC, DOU), which passed the Moon at 1.07 LD on January 18th and Earth the next day at 0.63 LD. Today's DOU MPEC has follow-up for approaching 2018 AH12, inbound 2018 BU1, departed objects 2018 BB3, 2018 BW1, and 2017 XS (adding 12.92 days to what had been a 31.61-day observing arc), and distant 208023 1999 AQ10.

Reading: Phys.org has posted an Associated Press article about finding the first meteorites from the January 16th Michigan bolide (17th UTC). And a new science paper by Mike Brown and Bryan Butler about "Medium-sized satellites of large Kuiper belt objects" shows the massive new ALMA radio telescope in Chile being put to work on planetary science.

Notes: Ten times the distance to the Moon (ten LD) has no astronomical importance but is a useful boundary for reporting about transient natural objects that approach our planet's gravitational sphere of influence (SOI), which has a radius of about 2.41 LD from Earth's center. This puts a focus on some of the most important and very best NEO observation work, representative of the much larger NEO discovery and tracking effort. "Distant" is used here to describe an object that has come within ten LD since A/CC began these traffic reports (2007) but is not now so close. Object temporal distances are derived by A/CC from JPL Horizons data. See also current sky chart and object details (alt-details), ephemerides, and today's timeline.

NEOCP Activity on 23 January '18

The MPC's NEO Confirmation Page has 91 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 91 objects listed. Of these, 52 were "one nighters." So far The Tracking News has counted a total of 133 listings on the NEOCP today.

K15KG7N2015 KN167 (q=37.757 AU, Q=58.907 AU, H=8.3 ~74.1 km) was picked up at 0851 UT on 24 May 2015 by Petit/Mauna Kea, observing it at 2014 May 29.38-46p3 at r=24.0-6, 2014 May 30.49p1 at r=24.2, 2014 May 31.41p1 at r=24.4, 2014 June 21.39-42p2 at r=24.3-6, 2014 July 19.30-32p2 at r=24.0-7, 2015 Feb. 20.66p1 at r=24.8, 2015 March 19.57p1 at r=24.0, 2015 March 21.63p1 at r=24.2, 2015 April 18.51p1 at r=24.1, 2015 May 17.38p1 at r=24.4, 2015 May 17.43p1 at r=23.9, 2015 May 17.47p1 at r=24.3, 2015 May 24.37p1 at r=24.3, 2015 May 24.42-46p2 at r=24.3-4, 2015 May 26.44p1 at r=24.0, 2015 June 18.34-38p2 at r=24.2-3, 2015 June 21.36p1 at r=24.5, 2015 July 10.39p1 at r=24.8, 2015 July 18.32p1 at r=24.5, 2016 Feb. 6.63p1 at w=24.5, 2016 Feb. 12.61p1 at w=24.6, 2016 March 15.62p1 at w=24.5, 2016 April 3.55p1 at w=24.6, 2016 April 8.60p1 at w=24.7, 2016 April 29.48p1 at w=24.7, 2016 May 4.41p1 at w=24.3, 2016 May 30.47p1 at w=24.1, 2016 July 4.29p1 at w=24.6, 2016 July 5.36p1 at w=24.6, 2017 July 28.31p1, 2017 Aug. 19.27p1 at w=24.7, 2017 Aug. 25.28p1 at w=25.0, and 2017 Aug. 26.26p1 at w=24.7.

K15KG7M2015 KM167 (q=31.885 AU, Q=64.611 AU, H=8.9 ~56.2 km) was picked up at 0819 UT on 21 May 2015 by Petit/Mauna Kea, observing it at 2015 March 19.64p1 at r=24.5, 2015 March 22.57p1 at r=24.4, 2015 April 13.58-62p2 at r=23.9-24.1, 2015 May 21.35-43p3 at r=24.4-5, 2015 May 22.51p1 at r=24.2, 2015 May 25.50p1 at r=24.2, 2015 June 20.39-43p2 at r=23.6-24.2, 2015 July 12.31p1 at r=24.8, 2015 July 18.40p1 at r=24.1, 2016 Feb. 6.65p1 at w=24.5, 2016 Feb. 12.63p1 at w=25.1, 2016 March 15.64p1 at w=24.7, 2016 April 3.56p1 at w=24.3, 2016 April 8.61p1 at w=24.3, 2016 April 9.55p1 at w=24.2, 2016 April 29.51p1 at w=24.1, 2016 May 4.48p1 at w=24.2, 2016 May 30.44p1 at w=24.5, 2016 July 4.31p1 at w=24.9, 2016 July 5.39p1 at w=24.3, and 2017 March 28.61p1 at w=24.5.

K15KG7L2015 KL167 (q=35.468 AU, Q=60.231 AU, H=8.3 ~74.1 km) was picked up at 0814 UT on 21 May 2015 by Petit/Mauna Kea, observing it at 2014 May 30.39p1 at r=24.5, 2014 May 31.42p1 at r=25.0, 2014 June 1.31p1 at r=24.4, 2014 June 1.36p1 at r=24.5, 2015 March 19.64p1 at r=24.5, 2015 March 22.56p1 at r=24.1, 2015 March 22.63p1 at r=24.6, 2015 April 13.57-61p2 at r=24.2-8, 2015 April 18.59p1 at r=25.2, 2015 May 21.34-43p3 at r=24.4-6, 2015 May 22.50p1 at r=24.5, 2015 May 25.49p1 at r=24.5, 2015 June 20.38-42p2 at r=23.9-24.3, 2015 June 23.44p1 at r=24.6, 2015 July 12.31p1 at r=24.6, 2015 July 18.39p1 at r=24.8, 2016 Feb. 6.63p1 at w=24.8, 2016 Feb. 12.61p1 at w=24.4, 2016 March 15.62p1 at w=25.3, 2016 April 3.55p1 at w=24.6, 2016 April 8.60p1 at w=24.3, 2016 April 29.50p1 at w=24.9, 2016 May 4.47p1 at w=24.4, 2016 May 30.47p1 at w=24.5, 2017 July 28.31p1 at w=24.6, 2017 Aug. 20.26p1 at w=25.4, 2017 Aug. 26.27p1 at w=25.1, and 2017 Aug. 31.26p1 at w=24.3.

K15G51Y2015 GY51 (q=33.072 AU, Q=62.655 AU, H=7.5 ~107 km) was picked up at 0822 UT on 13 April 2015 by Petit/Mauna Kea, observing it at 2015 Feb. 20.60p1 at r=24.0, 2015 April 13.35-39p2 at r=23.8-24.0, 2015 April 13.46p1 at r=23.7, 2015 April 19.39p1 at r=23.4, 2015 April 19.50p1 at r=23.8, 2015 May 18.26p1 at r=24.0, 2015 June 20.26-30p2 at r=24.1-3, 2015 June 22.31p1 at r=23.9, 2015 July 14.26p1 at r=23.8, 2015 July 20.25-26p2 at r=23.8-24.4, 2016 Feb. 4.55p1 at w=24.2, 2016 Feb. 10.54p1 at w=24.6, 2016 March 11.54p1 at w=24.2, 2016 April 3.42-43p2 at w=24.0-1, 2016 April 9.40p2 at w=24.1-2, 2016 May 1.35p1 at w=24.2, 2016 May 2.29p1 at w=24.0, 2016 May 6.30p1 at w=24.1, 2016 May 28.27p1 at w=24.3, 2016 June 4.35p1 at w=24.3, 2016 June 27.27p1 at w=24.0, 2016 July 6.30p1 at w=24.3, 2017 Feb. 24.63-64p2, 2017 March 28.56-57p2 at w=24.1, and 2017 June 21.29p1 at w=24.1.

Impact Risk Monitoring on 23 January '18

Summary Risk Table for Risk Assessments Updated Today (last checks: NEODyS at 2358 UTC)
See the CRT page for a list of all objects rated recently as risks and our ephemerides page for a list of risk-listed objects under current observation.
The time horizon for JPL is 100 years from today and for NEODyS is usually the year 2090. Both also post impact solutions beyond 100 years for a few special objects.
For the latest official risk assessments, and for explanations of the terminology, see the NASA/JPL Sentry and NEODyS CLOMON2 risk pages.

0000NNN000

Object

RiskMonitor

WhenNotedUTC

0000T0000YearRange

VI#

000NN00ProbCum

T0000PSCum

T0000PSMax

TS

Notes for Today's Latest Risk Assessments

2018 BP3

JPL Sentry

1935

2115-2115

2

5.903e-06

-7.42

-7.61

0

JPL: Computed at 11:05 today Pacific time based on 28 observations spanning 1.0068 days (2018-Jan-22.36003 to 2018-Jan-23.36687). Diameter approximately 0.006 km. from weighted mean H=28.66.

2018 BM3

JPL Sentry

1836

2101-2116

5

4.8805e-08

-5.79

-5.87

0

JPL: Computed at 10:10 today Pacific time based on 16 observations spanning 3.9413 days (2018-Jan-19.45702 to 2018-Jan-23.39829). Diameter approximately 0.159 km. from weighted mean H=21.67.

2018 BL1

JPL Sentry

1650

R E M O V E D

JPL: Risk listing removed at 1634 UTC today

NEODyS

1650

2104-2108

2

1.43e-10

-9.18

-9.26

0

NEODyS: "Based on 16 optical observations (of which 0 are rejected as outliers) from 2018-01-16.417 to 2018-01-20.467."

2018 BH1

NEODyS

1650

2062-2095

4

8.4e-08

-7.12

-7.36

0

NEODyS: "Based on 13 optical observations (of which 0 are rejected as outliers) from 2018-01-16.351 to 2018-01-21.466."

2018 BP

JPL Sentry

1650

2052-2068

6

2.22265e-07

-4.52

-4.85

0

JPL: Computed at 07:59 today Pacific time based on 57 observations spanning 7.0095 days (2018-Jan-16.15431 to 2018-Jan-23.16378). Diameter approximately 0.260 km. from weighted mean H=20.55.

NEODyS

1650

2056-2114

4

1.37e-09

-6.81

-6.88

0

NEODyS: "Based on 46 optical observations (of which 7 are rejected as outliers) from 2018-01-16.155 to 2018-01-22.107."

2018 BC

NEODyS

1650

2089-2115

14

1.45e-05

-7.39

-7.57

0

NEODyS: "Based on 54 optical observations (of which 2 are rejected as outliers) from 2018-01-17.211 to 2018-01-20.504."

2018 AE4

NEODyS

1650

2098

1

1.59e-09

-8.80

-8.8

0

NEODyS: "Based on 38 optical observations (of which 5 are rejected as outliers) from 2018-01-13.463 to 2018-01-22.392."

2018 AE3

JPL Sentry

1650

R E M O V E D

JPL: Risk listing removed at 1551 UTC today

2017 UR51

JPL Sentry

1650

R E M O V E D

JPL: Risk listing removed at 1556 UTC today

2017 US

NEODyS

1650

2085-2115

16

5.67e-04

-4.19

-4.2

0

NEODyS: "Based on 121 optical observations (of which 4 are rejected as outliers) from 2017-10-16.346 to 2017-11-13.062."

An impact solution, also known as a "virtual impactor" (VI), is not a prediction but rather a possibility derived from a variant orbit calculation that cannot be eliminated yet based on the existing data. Elimination can come quickly with just a little further observation or may take weeks or months, sometimes years. Once superceded or eliminated, a former impact solution has zero relevance to an object's risk. See Jon Giorgini's "Understanding Risk Pages" to learn more.